Pump-jack



E TYDEN.

PUMP JACK. APPLLCATION man MAY 13, 1920.

1,3 7,211 Patented Feb. 1, 1921.

22 a H 5; i fig a J21 6' 26 i? J6 l j F E -;g Z E 1/6 T INVENTOR" lzzzzjdw 2978A TTORNE Ksence being had to the accompanying draw UNITED STATES EMIL 'IYDEN, OF HASTINGS, MICHIGAN,

PUMBJAGK.

Application filed May 13,

To all whom it ma concern: 1

Be it known that I, EMIL TYDEN, a citizen of the United States, residing at Hastings, in the county of Barry and the State of Michigan, have invented certain' new and useful Improvements in Pump-Jacks, of which the following is a specification, referings, forming a part thereof.

The purpose of this invention isto provide an improved structure of the nature of a pump jack, the specific purposes being to make such jack in such form that theworking parts may be inclosed in a casing forming a grease receptacle, so that lubrication may be provided for without waste of grease orfrequency of attention. A further purpose is to provide a very compact .and economical construction. The invention consists inthe elements and features'of construction shown and described, as indicated in the claims.v j

the cover member of'the casing being re moved and the pitman-carried hood being shown in section at the Plane of junction of p j elongated exteriorlyprotruding boss, 5, of, Fig. 4c is a section at the l1ne,4-f1=, on p the cover and casing.

l ig. 5 is a section at the line, 5-5,'on

Fig. 6 is a detail side elevation of a po rtion ofthe operating chain showing a special form of" link having guard shoes for prevcntlng them-buckling of the chain.

In the construction shown in the draw= ings, 1 represents the pump standard, 2, the L plunger rod, 3, the pump-operating handle lever. 4, 4:, are pitmanlinks connecting the hand lever with the pump plunger rod, 2. It will be understood, of course, that these details of construction of the pump are notj any part of the present inventiomthe pump being of necessity shown to illustrate the j mode of use and serviceability of the pump jack. The pump jack comprises a casing consistlngof two members, 5 and 6, secured together at a grease-tight joint by means of Specification, of Letters Patent.

PatentedFeb. 1,1921. 1.920. Serial No. 381,033.

their respective flanges, 5 and 6, and formed so that when thus secured together there is produced a slot, 5 at the upper side for the emergence of the pitmanlink of the jack, as hereinafter more particularly de scribed. Mounted within the casing upon stud axles projecting inward from the lateral wall of the casing member, 5, are sprocket wheels, 7 and 8, about which the endless chain, 9,travels. The uppersprocket wheel, 8, has the stud, 10, upon. which it is j ournaledl formed unitarily with the casing member, The stud axle for the lower sprocket wheel, 9, ispreferably an independent machined stud which isformed with a shoulder, 11, whose reduced end, 11 is driven back to the shoulder tight into a boss,

5, with which the casing member, 5, is provided, the stud axle being permanently secured in the casing by being upset at the outer end as shown at 11; l2is the jack pitman which is pivotally connected atthe lower end to one of the links of the chain, 9, as shown by the pivot stud l At its upper end it is pivotally connected by means of a clamp or clasp, 141, to the pump handle, 3, at a position immediately in the rear of the hand-hold of said handle lever. The endless the case member, 5, the formation ofthe pinioniin the manner described on the inner side of said shaft by inputting the. teeth,

permitting the introduction of the integral shaft and pinion through the shaft bearing from the outer side; and the shaft is retainedin its hearing by a key pin, 2 1, engaging a circumferential groove, 16", formed 1n the shaft back of the pinion end. Power is;

communicated to the shaft, 16, by a drive pulley, 18, which'is pressed from sheet metal in cup or dish-form, the web 18, being secu -ed to the protruding end of the shaft, 16.

1 Preferably said shaft, 16, is terminated with the radially-extended flange, 16, and the web, 18, of the pulley, 18, is further struck out orrecessed at 18 to accommodatethe flange, 16". A grease drip-return sleeve, 19,

most conveniently formed in cup form, that is, with a bottom or end web, 19, has

saidweb interposed between the end of the shaft or its flange, 16 and the web 18 of the pulley, 18, so as to be secured to the shaft together with the pulley; and a reinforcing disk, 20, is provided, applied outside of the said web, 18, of the pulley, said reinforcing disk beingsimilarly struck out or recessed at 20*, so that the three parts, the greasedrip-return member, 19, the recessed portion, 18 of the web, 18, of the pulley, and the recessed portion, 20?, of the reinforcing disk, 20', are nested together in their application to the flange, 16, which terminates the shaft, 16, and for securement of all said parts together to the shaft by means of rivets," 21, which effect said securement to the flange of the pulley. This flange is pro- 7 vided, in lieu of terminating the shaft with outenlargement, especially for the advantage-which is thus afforded of securing the partsmentioned to the shaft by riveting, whereas, otherwise it would be necessary to 7 use screwsengaging tapped holes in the end of the shaft, which is a less secure and more expensive method.

casing may be filled with grease up to the journal bearing of the combined sprocket wheel and gear, 9, 15 and that the gearand-sprocket wheel and the chain dipping in the'grease will'carry'it to all the parts requiringto be lubricated, including the in termeshin'g gear, 15, and pinion, 16*, the chain at all its links, the pivotal connectionof the pitman, 12, to the chain, the engagement of the chain with both the sprocket wheels and the journal bearing of the upper. sprocket Wheel.

In order to prevent leakage outside of the casing and loss of grease which might work out through the Journal bearing of the shaft,

16, jin the boss, 5 a. grease-return sleeve, 19, 1s provlded as above mentioned, and to take the drip for delivery from this sleeve which at lts inner end is outwardly flanged, as seen at 19*, the casing member, .5, is expanded at the outer side toward the pulley, as seen at "5?, forming a chamber or cavity, 5, which extends around the boss, 5, which supports the stud axle, 11, of the sprocket and gear wheel, 915, and also around the initial or base portion, of the boss, 5 in which the shaft, 16, is journaled; and said casing is further expanded to form an annular flange, 5f, encompassing the said bearing, 5, and spaced off therefrom to form the annular Iopening through which the grease drip sleeve, 19, is protruded. lhis causes the inner end of said drip sleeve to extend with in the cavity, 5 and deliver the grease which may be gathered, back into said cavity; and

this cavity is connected at its lower side by the aperture, 5 with the main cavity of the casing. But in fact the grease originally supplied to the casing occupies the joint through which grease could esrape from the casing is the journal bearing of the shaft, 16; so that the above described provision for returning any grease drip which may work out through this hearing insures the retention of all the grease in the casing, avoiding entirely waste of grease while insuring complete lubrication of all the parts.

In view of the oscillation of the pitnian, 12, which is a necessary incident of its lateral swing as it passes around the sprocket wheels, and also of the vibration of the pump handle at the upper end, the slot, 5", at the upper side of the casing is required; and it becomes necessary to provide against water or dirt entering the casing through this slot. For this purpose there is provided the hood, 25, which tapers from its upper end where it is closely fitted around the pitnian, to its lower end where it extends over the entire length and width of the slot, 5. This hood is supported by being pivoted intermediate the edges of its expanded lower end to flanges, 5 and (3*, with which the casing members, 5 and 6, respectively, are provided, around the slot, 5, a pivot bolt, 26, supporting said hood and permitting it to oscillate with the pil'nian, its ends extending down outside the flanges, 5". (3.

insuring complete closure of the slot and the diversion outside the casing of any water which flows down the hood.

Upon consideration of the operation of the chain drive of the pitinan, 12, operating the pump, it will be seen that there will be a tendency to thrust inward,that is, toward the plane containing the axes of the two sprocket wheels,the link of the chain to which the pitinan is pivoted as the pivot is being carried across the interval between the two sprocket wheels in either course of the chain; and it will be seen that this inward thrust has a tendency to cause the chain to become locked on one sprocket wheel or the other, that is, the tendency would be to prevent the link from clearing the last engaged sprocket of the sprocket wheel from which the chain was moving at the time of such inward thrust. To prevent such inward thrust and the resultant tendency to lock the chain, there is provided a shoe extension, 27, of the same link to which the pit man is pivoted, said shoe extending in both directions from its pivot,up and down, as seen in Figs. 8 and 6,-to lap onto the adjacent links of the chain at both sides, on the outer side thereof,that is, on the side remote from the sprocket wheel; thus insuring the chain remaining practically straight during this part of its course.

In, order to permit adjustment to vary the length of the pump stroke by shifting two cl amps,

the engagement of the pitman, 12, along the pump handle lever, 3, the ack casing is mounted on the pump valve, 1, by means of and 23, thel ormer a two-part clamp located at the lower end of the pump valve and of the casing and secured to the "casing by one of the clamping bolts, 22, and the other a one-' part clamp folded to form an eye,23, which encircles the pump barrel and is clamped thereto by the bolt, 23*; and the two arms, 23, extending parallel for embracing the jack casing members, 5 and 6, between them, are secured to the casing by a bolt, 23. For the adjustment mentioned said parallel arms have each a series of bolt holes, 23, and the adjustment is made by swinging the casing on the bolt, 22 as a pivot, to

except as to driving shaft and pump rod emergences; an endless chain, and sprocket wheels within the, casing about which the chain travels; means for mounting the casing upon the standard or main barrel of the pump to be served with the path of the endless chain between the sprocket wheels approximately vertical; one of the sprocket wheels having a gear rigid with it; a driving shaft journaled in the side wall of the casing, and a pinion on the inner end of the shaft within the casing meshing with said gear on the sprocket wheel.

In the construction defined in claim 1 foregoing, the casing being formed with an enteriorly-projecting, relatively long boss, in which the shaft journal bearing is formed extending therethrough, and a drive pulley in the form of a cap or cup having its web or bottom secured to the outer end of the shaft and itsv wall or flange constituting the belt-carrying face of the pulley encompassing the protruding shaft bearing boss.

3. In the construction defined in claim '1 foregoing, the casing having an exteriorlyprojecting boss in which the shaft journal bearing is formed extending therethrough, said shaft having at its outer end a radiallyprojecting flange for stopping the shaft upon the outer end of said boss, and a drive pulley in cup or cap form having its web or bottom riveted to the said flange at the outer side thereof, the securing rivets taking through the overhanging flange beyond the diameter of the shaft proper.

4L. In the construction defined in claim 1 foregoing, the casing having an exteriorly therefrom at the lowerside and aslecve like member secured on the protruding end of the shaft extending inward toward the casing and encompassing said journal boss 7 and entering within the annular boss for delivering oil drippings into the recess of the latter.

5. A pump jack comprising in combination with a casing and means for mounting it upon the standard or barrel of the pump to be served, sprocket wheels journaled in said casing and an endless chain encompassing and traveling about the same; a pitman pivotally connected with a link of said chain and extending out of the casing for operative connection with the pump plunger rod, the casing having at its upper end a slot in which the pitman may oscillate as it is carried at its lower end around the sprocket wheels, the water-shedding hood encompassing said pitman and fittin it closely at its upper end, and tapered t ence downward for overhanging and extending laterally with respect to the swing of the pitman beyond the ends of the slot and means engaging it at its lower end with the upper end of the casing for sliding at that end back and forth along the slot as the pitman oscillates.

6. In a pump ack, in combination with a. casing, two sprocket wheels therein and an endless chain encompassing and traveling about said sprocket wheels; a pitman pivotally connected at its lower end to a link of the chain extending out through the upper end of the casing, the latter being slotted for emergence of the pitman and to accommodate its oscillation as it is carried by the chain around the sprocket wheel at its lower end; a water-shedding hood encompassin the pitman and at its upper end fitting sai pitman closely, said hood being pivoted at its lower end to the casing and extended in the direction of oscillation of the pitman to overhang the slot in the casing through which the pitman emerges and in which it oscillates, the casing having flanges bounding said slot, and the hood at its lower end extended to embrace said flanges through the entire range of oscillation of the hood about its pivotal connection with the casing. 7 In a pump jack in combination with a casing, a pair of sprocket wheels therein; an endless chain encompassing and traveling about the sprocket wheels; a pitman for engagement with the pump plunger rod operating handle at its upper end, having its lower end pivotally connected with a link of the chain, and a shoe carried by the same link and extending both Ways from its pivot to face 01" overhang the adjacent links at both sides of the link by which it is carried, and adaptedto bear against the outer side of said adjacent links at straightened-out position of the chain near its passage between the sprocket ,Wheels.

8, In combination with a pump, a jack fol-operating it having its casing pivotally mounted on "the pump barrel at the lower end thereof, and means for securing it at a 

